Fixed NULL pointer error, if no label is provided after the rule keyword.

2019-05-02 16:35:55 +03:00
parent 36381129e6
commit 5d687d7d2c
1 changed files with 7 additions and 1 deletions
--- a/src/rules.c
+++ b/src/rules.c
@@ -237,7 +237,13 @@ int  ruledata()
   {
      case -1:     err = 201;      /* Unrecognized keyword */
                   break;
-      case r_RULE: Nrules++;
+      case r_RULE: /* Missing the rule label -> set error */
+                   if (parser->Ntokens != 2)
+                   {
+                      err = 201;
+                      break;
+                   }
+                   Nrules++;
                   newrule();
                   RuleState = r_RULE;
                   break;